[PATCH 06/19] loongarch: define DPS root partition type UUID

[Vincent Mailhol]

DPS [1] assigns GPT partition type UUIDs to operating system partitions.
Root partitions use architecture-specific type UUIDs so the OS can
discover the intended root filesystem without relying on a root= cmdline
option.

Define DPS_ROOT_PARTITION_TYPE_UUID in asm/dps_root.h for LoongArch64
and select ARCH_HAS_DPS_ROOT_PARTITION_TYPE_UUID.

[1] The Discoverable Partitions Specification (DPS)
Link: https://uapi-group.org/specifications/specs/discoverable_partitions_specification/

Cc: Huacai Chen <chenhuacai@xxxxxxxxxx>
Cc: WANG Xuerui <kernel@xxxxxxxxxx>
Cc: loongarch@xxxxxxxxxxxxxxx
Signed-off-by: Vincent Mailhol <mailhol@xxxxxxxxxx>
---
 arch/loongarch/Kconfig                | 1 +
 arch/loongarch/include/asm/dps_root.h | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index 606597da46b8..64c27740b8a1 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -17,6 +17,7 @@ config LOONGARCH
 	select ARCH_HAS_CPU_FINALIZE_INIT
 	select ARCH_HAS_CURRENT_STACK_POINTER
 	select ARCH_HAS_DEBUG_VM_PGTABLE
+	select ARCH_HAS_DPS_ROOT_PARTITION_TYPE_UUID
 	select ARCH_HAS_FAST_MULTIPLIER
 	select ARCH_HAS_FORTIFY_SOURCE
 	select ARCH_HAS_KCOV
diff --git a/arch/loongarch/include/asm/dps_root.h b/arch/loongarch/include/asm/dps_root.h
new file mode 100644
index 000000000000..6022b60428ad
--- /dev/null
+++ b/arch/loongarch/include/asm/dps_root.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _ASM_LOONGARCH_DPS_ROOT_H
+#define _ASM_LOONGARCH_DPS_ROOT_H
+
+#define DPS_ROOT_PARTITION_TYPE_UUID "77055800-792c-4f94-b39a-98c91b762bb6"
+
+#endif /* _ASM_LOONGARCH_DPS_ROOT_H */

-- 
2.53.0